Tamping-bar.



PATENTED OCT. l5, 1907. E. W. WHEELER.

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ERNEST W. WHEELER, OF BAY CITY, MICHIGAN.

TAMPING-B AR.

Specification of Letters Patent.

Patented Oct. 15, 1907;

Application led December 6, 1906. Serial No. 346,630.

To all whom it may concern:

Be it known that I, ERNEST W. WHEELER, a citizen of the United States,residing at Bay City, in the county of Bay and State of Michigan, haveinventedcertain new and useful Improvements in Tamping-Bars; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to a tamping bar, one object of which is theprovision of a device of this description, wherein the end of the barcontacting with the material to be compacted may be guided, in order toprevent its engagement with the walls of the mold or other receptacle inwhich the material to be tamped is contained.

My invention is capable of use in any place where the usualone-piece'tamping bar may be used, but in addition thereto it may be sooperated that the walls of the mold are uninjured when tamping thematerial contained by the mold.

This construction is capable of use in laying concrete and asphaltside-walks or pavements, as well as for tamping brick or block material,shingles, sewer and land tiles or posts in molds. In fact, it is usefulin all concrete work where a tamping bar is used, as well as for moldersuse. v

Another object of my invention is the provision of a reversible tampingbar provided with a head at each end, the heads preferably being ofdifferent dimensions, in order to adapt the tamping bar to any conditionof use.

A further object of my invention is the provision of a tamping barwherein the force of impact will be increased.

Still another object of my invention is the provision of means wherebythe jar of impact will not be communicated to the hand and arm of theoperator, as well as to avoid the battering up of the head of thetelescopic rod and otherwise damaging the head of the bar, and to reducethe noise of impact to a minimum, which objects I attain by interposinga cushion between the actuating portions of the bar.

A still further obj ect is the provision of means whereby the bar can beinstantly changed to a one-piece bar in effect, or vice versa.

To these and other ends, therefore, my invention consists in theprovision of a two-piece telescopic reversible bar provided withcushioning means and with means for locking the component parts of thebar together, or for releasing them.

In the accompanying drawings, Figure l is a view in side elevation, Fig.2 is a part sectional View thereof, and Fig. 3 is a detail view of thesplit sleeve.

It will be understood that the drawing indicates but one of a number ofconstructions in which my invention may be embodied, and with this inmind, (A) indicates the hollow member and (B) theY coperating mem` berof my tamping bar, the member (B), in the present instance, comprising arod which is telescopically received in the member (A) and upon whichthe member (A) telescopes, the bar being reciprocated into and out ofthe hollow member (A), or by reversing the bar, the hollow member (A) isreciprocated up and down upon the rod (B).

I preferably provide a foot (l) equipped with a socket (2), in which thelower end of the hollow member (A) is received. Obviously, the socketmay be reduced to form a nipple receivable-in the lower end of thehollow member (A), this being an equivalent construction and notnecessarily indicated.

That end ofthe rod (B) which is receivable Within the hollow member isheaded, as at (3), and within the socket (2) or upon the nipple islocated a cushioning element which may consist of a rubber or other disk(4) in line with and against which the headed end of the rod (B)engages, whereby to prevent the jar of impact being communicated to thehand and arm of the operator. as well as avoiding a battering of thehead of the telescopic rod and otherwise damaging the head of the bar.The cushioning means also operates to deade-n the sound of the impact,lthough it is not suicient to reduce the force of impact of the headedend of the rod (B) against the foot (l) to any appreciable extent.

The outer end ofthe rod (B) is equipped with a tamping head (5) whichmay be threaded upon the outer end of the bar, a lock-nut (6) beingprovided to hold the head firmly in place. This head (5) will afford asufficient amount of weight to impart plenty of impetus to the rod whenthe latter is actuated.

From the foregoing, it will be seen that the operator may grasp thehollow member (A) withhis left hand and guide the foot (l) along thesideof a mold without raising the foot out of the mold. The right hand ofthe operator will grasp the rod (B), reciprocating the same relative tothe hollow member (A), the tamping head (5) increasing the force ofimpact of the headed end (3) of the rod against the foot (l). Thetamping head (5) should be smaller than the foot (l), for instance, andit isperfectly evident that by reversing the tool, the tamping head (5)may be made to Contact with the material to be compacted, the tampinghead being guided by the left hand of the operator, while the right handofthe operator reciprocates the hollow member (A) on the rod, causingthe foot (l) to impinge against the headed end (3) of the rod. In thismanner, owing to the provision of the cushioning element (4), the jar ofimpact is not communicated to the hand and arm of the operator, the headof the telescopic rod is not battered up, or otherwise damaged, thesound of impact is deadened, and the tool is made reversible to meetdifferent conditions of work. Furthermore, in use, the faces of the foot(l) and tamping head (5) are not liable to contact with the edges of themolds, which latter are thereby saved from injury.

In order to prevent the accidental disengagement of the rod (B) andhollow member (A), I preferably provide a perforated cap (7) receivableupon the upper end of the hollow member (A), the rod (B) passing throughthe aperture in the cap, which aperture is smaller than the headed end(3) of the rod.

As one means for converting the foregoing construction into a solidtamping bar, wherein one member will be stationary relative to theother, I preferably provide a frusto-conical split sleeve (8) (shown indetail in Fig, 3). This split sleeve is received within the upper end ofthe hollow member (A) in which it is seated, and is adapted to beengaged by thel cap (7) screw threaded on the upper end of the hollowmember (A). By screwing the cap (7) tightly upon the hollow member (A),the split sleeve (8) is forced further down into the hollow member andis contracted to frictionally engage the rod (B), and prevent movementthereof relative to the hol- 'low member (A), thus converting the toolinto a solid tamping bar. It is obvious that the length of the tool maybe suitably adjusted and locked in position by means of the cap andsplit sleeve. To release the rod (B) from the hollow member (A), allthat is necessary is to slack up or partially unscrew the cap (7),whereby the sleeve will be permitted to expand to release the rodrelative to the hollow member.

It is evident that many changes might be made in the form andarrangement of the several parts described without departing from thespirit and scope of my invention, and hence, I do not wish to limitmyself to the exact construction herein set forth.

Having thus fully disclosed my invention, what I claim as new is- 1. Arever-sible tamping bar comprising a pair of member's movable relativeto each other, a foot carried by one of the members and a tamping headcarr'ied by the remaining member'.

2. A tamper comprising a hollow member, a foot secured to one endthereof, a rod member received within the hollow member, the rod memberadapted to project out of the hollow member', a tamping head on theprojecting end of the rod member, the tamper' being reversible to permiteither' member to reciprocate relative to the remaining member.

3. A tamping bar comprising a hollow member closed at one end, a rodreceivable within the member and a tamping head carried by the rod.

4. A tamping bar comprising a hollow member closed at one end, a rodloosely received in the opposite end of the hollow member and a tampinghead carried by the rod.

A camping bar comprisinga hollow member closed at one end, a rod, oneend of which is loosely receivable in the opposite end of the hollowmember,a tamping head carried by the outer end of the rod, and acushioning device located between the closed end of the hollow memberand the inner end of the rod.

hollow member, the inner end of the rod adapted to irnpinge against thecushioning member.

T. A rever-sible tamping bar comprising a hollow member, a rodreceivable therein, the member' and rod beingv movable relative to eachother, a tamping foot on the member, a tamping head on the rod and meansfor preventing the accidental disengagement of the rod and member.

8. A tamping bar comprising a hollow member, a telescopic memberreceivable in the hollow member, one member adapted to reciprocaterelative to the remaining member', a headed end on the telescopic memberreciprocating within the hollow member, and a perforated cap carried bythe hollow member and engaged by the headed end to pre vent theaccidental disengagement of the members relative to each other.

9. A tamping bar comprising a hollow member, a telescopic memberreceivable in one end of the hollow member, one of the members movablerelative to the other member, a compactiug element carried by thestationary member, and means for releasahly locking the two members together at any point in their adjustment.

10. A tamping bar comprisingr a hollow member, a telescopic memberreceivable in one end of the hollow member, one of the members movablerelative to the other member, a compacting'element carried by thestationary member, a locking sleeve seated in one end of the hollowmember, and a cap adjustable on the hollow member' and adapted to engagethe locking sleeve to releasably lock the members together at any pointin their adjustment.

11. A tamping bar comprising a hollow member closed at one end, atelescopic member receivable in the opposite end of the hollow member',a compacting element carried by one of the members, a head on the inner'end of the telescopic member', a locking sleeve seated in the open endof the hollow member, and a perforated cap receivable on the open end ofthe hollow member, the cap adapted to retain the members in engagementwith each other and to cooperate with the sleeve to lock the memberstogether'.

l2. A tamper comprising a hollow member, a tamping foot located at oneend thereof, a perforated cap located at the opposite end thereof, andhaving its perforation of less diameter than the bore of the hollowmemberso as to overhang the bore, a rod passing through the perforationand received within the hollow member, and an enlarge4 ment on the'innerend of the r'od of greater size than the diameter of the perforation inthe cap.

13. A tamper comprising a member, a tamping foot carried thereby, a rodadjustable relative to the member', and means for releasably securingthe rod and member to gether at any point in their adjustment.

14. A rever-sible tamper comprising a member, a tamping foot carriedthereby, a rod adjustable relative to the member, a tamping head carriedby the rod, and means for releasably securing the rod and membertogether at any point in their adjustment.

In testimony whereof, I affix my signature in presence of two witnesses.

ERNEST W. WHEELER.

Witnesses:

F. C. KnLToN, J. E. WRIGHT.

